As I've mentioned before I am looking to complete all 50 achievements in Bioshock.  I am now sitting at 48 achievements unlocked and just need to complete the game on Hard and find all 53 tonics.  Well I'm almost at the end of the game so I decided to figure out which ones I'm missing.

I've bought, created or discovered 50 of the 53 tonics so I got a list from the Xbox.com forums.  I started crossing off the tonics and narrowed down the ones I was missing.  Turns out some of the tonics are only given to you if you rescue all of the Little Sisters.  Well, this time around I'm playing the harvest path so I have not gotten these tonics.  I did have a save from my first play through. 

I loaded that save and discovered I had 51 of the 53 tonics and just needed to purchase the last two tonics.  I went to purchase the tonics and realized I did not have enough Adam.  The first time around I bought all these extra plasmids and blew through all my Adam.  I had just enough to buy one of the two tonics I needed.

I was a tad bit pissed when I realized I would have to do a third play through to get this achievement.  Right now I'm a bit BioShock'd out.  I will play through to get the Seriously Good At This achievement but will have to put BioShock on the shelf for a while.  There are free Gears of War maps to play on so I think I need to play some Gears to get ready for Halo 3.